. >> hillary clinton is taking responsibility for the attack in libya that killed chris stevens and three other americans. a lack of security, the secretary says when it comes to protecting diplomats overseas, the buck stop wits with her. >> i take responsibility. the president and vice president wouldn't be knowledgeable about specific decisions about security. i believe tragedies like what happened in benghazi should be viewed in a non-political way. everybody should pull together as americans. >> clinton says she doesn't want the incident to become some kind of political blame game. >> police hope someone can identify two men. sarah sampson joins us live with more on the story. good morning. >> good morning. detectives released the picture yesterday. it shows two young men in the vit wasere dr. peter marvi gunned down. this surveillance photo shows two men sprinting down chesterfield avenue just aftet 10:00 pm on september 17th. according to police, this was the only sign of life on the street as dr. peter marvit lay dying nearby. >> we're calling them persons of interest right now. th